Browse Publications Technical Papers 2016-01-0273
2016-04-05

Accelerated Vibration Fatigue Testing Using a Mixture of Random and Impulsive Excitations 2016-01-0273

Methods for conducting accelerated vibration fatigue testing of structures, such as MIL-STD-810G, allow for the non-linear scaling of the test time with the inverse of the rms vibration amplitude based on the slope of the material S-N curve obtained from cyclic fatigue tests. The Fatigue Damage Spectrum (FDS) is used as a method to allow for different level scalings at different frequencies in a broadband vibration environment using the relative responses of resonances in the structure. A recent development in industry has been to mix impulses with random excitations to increase the vibration peak levels (as measured by the kurtosis), thereby accelerating the fatigue even more than would occur with a Gaussian excitation. This paper presents results from a study to determine the conditions under which high kurtosis, impulsive excitations actually produce high kurtosis responses in structural resonances thus increasing the level of the FDS.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Efficient and Accurate Evaluation and Improvement of Engine Radiated Noise

2013-01-1005

View Details

TECHNICAL PAPER

Fatigue Damage Assessment of Vibration Test Exaggeration Methods

930402

View Details

TECHNICAL PAPER

Calculation of Random Vibration Fatigue Life from Finite Element Model Calculations

940244

View Details

X